Polycom HDX Mica Microphone Array HDX Table Microphone Array, three microphone elements pick up audio in a 360-degree pattern around the mic, w/15ft cable. Walta connector requires a conversion dongle to connect to SoundStructure device. Use Walta Female to RJ-45 Male Cable with HDX Microphone Cable, or use CLink2 CrossOver Cable with Walta Male to RJ-45 Female Cable.